Mario Clifford Rivera, who goes by the nickname “Chuky,” was operating the drug ring from the state prison in Doral.

Whether you operate on the streets or behind prison walls, we will identify your leaders and members, dismantle your networks ...

Mario Clifford Rivera ran the drug ring using prison phones and contraband cellphones and shipped fentanyl via USPS.

The company wants to use that proximity to shoppers to its advantage, said Mario Rivera, chief supply chain and logistics officer. “How are we leveraging that strength, that competitive ...